#include "stdio.h"
#include "stdlib.h"
int main(void){
	int a;
	int c;
	printf("enter two numbers:");
	scanf("%d %d",&a,&c);
	printf("add:%d\n",add(a,c));
	printf("sub:%d\n",sub(a,c));
	printf("mul:%d\n",mul(a,c));
//	printf("div:%d\n",div(a,c));
	return 0;
}
